Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f0a65fd5623c30…

MALICIOUS

PDF

49.6 KB Created: 2021-06-03 17:29:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f3611104123eee62f3546b17a6dfbc58 SHA-1: 7eedce18071350c0a704a1838988c5440e4cba50 SHA-256: 41f0a65fd5623c302b12abf5db1791994d8ed48cd3bf2770add035589102cf22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to a website offering 'free Robux' with no human verification, a common lure for scams. The heuristic firings confirm this is a malicious redirector link. Although no scripts were extracted, the document body and heuristics indicate the primary goal is to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/431946152/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005220.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5220 25868 bytes
SHA-256: 6cac4dd34ca3ea5d35545053aaf545cc968cc64715e99017fdae951cbe10c063
font_01_sfnt_off00008e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2C 19556 bytes
SHA-256: 08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8

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